ISL8488 INTERSIL [Intersil Corporation], ISL8488 Datasheet - Page 3

• Manufacturer Part Number: ISL8488
• Description: 5V, Low Power, High Speed or Slew Rate Limited, RS-485/RS-422 Transceivers
• Manufacturer: INTERSIL [Intersil Corporation]

Truth Tables
Pin Descriptions
*Shutdown Mode for ISL8483 (see Note 7)
GND
V
PIN
A/Y
B/Z
RO
RE
DE
NC
RE
DI
A
B
Y
X
X
Z
CC
0
1
Receiver output: If A > B by at least 0.2V, RO is high; If A < B by 0.2V or more, RO is low; RO = High if A and B are unconnected (floating).
Receiver output enable. RO is enabled when RE is low; RO is high impedance when RE is high.
Driver output enable. The driver outputs, Y and Z, are enabled by bringing DE high. They are high impedance when DE is low.
Driver input. A low on DI forces output Y low and output Z high. Similarly, a high on DI forces output Y high and output Z low.
Ground connection.
Noninverting receiver input and noninverting driver output. Pin is an input (A) if DE = 0; pin is an output (Y) if DE = 1.
Inverting receiver input and inverting driver output. Pin is an input (B) if DE = 0; pin is an output (Z) if DE = 1.
Noninverting receiver input.
Inverting receiver input.
Noninverting driver output.
Inverting driver output.
System power supply input (4.5V to 5.5V).
No Connection.
INPUTS
DE
1
1
0
0
TRANSMITTING
ISL8483, ISL8485, ISL8488, ISL8489, ISL8490, ISL8491
DI
X
X
1
0
3
High-Z *
High-Z
Z
0
1
OUTPUTS
High-Z *
High-Z
Y
1
0
FUNCTION
*Shutdown Mode for ISL8483 (see Note 7)
RE
0
0
0
1
1
Half Duplex
DE
0
0
0
0
1
INPUTS
RECEIVING
Full Duplex
DE
X
X
X
0
1
Inputs Open
≥ +0.2V
≤ -0.2V
A-B
X
X
OUTPUT
High-Z *
High-Z
RO
1
0
1